Combined air and water heater



W. M. KEIGHLER, COMBINED AIR. AND WATER HEATER.

APPLICATION FILED 020.22. 1920.

Patented July 19, 1921.

Fi q.5.

ears-NT OFFICE.

Y wALTERmaKEIeHLnn-or PHILADELPHIA, PENNSYLVANIA;

' e i ED Al AND ii M i HEATER."

i I p c t o of Patented July 19, 1 921.

To all whom it may concern: I

Be 1t known'that I, WVALTER M. Knicnnnn,

. a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Combined Air and Water Heaters, of which the following is a specification.

This invention relates to a combined water and gas heater, and it will be found particularly serviceable for domestic uses, and one of its applications is in connection with a domestic water tank. The principal object of the invention is to provide an improved device which can be used to heat water for kitchen or other domestic purposes, and also for heating air to increase the temperature of the room or apartment.

A further object of the invention is to pro vide such a device at a small cost, and which can be applied to existing water heating systems, either alone or in connection with other devices.

The device serves to heat the air and water by conduction and also by reflection or radiated heat, and has advantages of simplicity and cheapness which will be apparent from the following description and the accompanying drawing.

In the drawing Figure 1 is an elevation of the device applied to an ordinary stand boiler or tank. F ig. 2 is a section on the line 2-2 of F ig. 1. Fig. 3 is a rear view of the device detached.

Referring specifically to the drawings, 6

indicates a stand tank or boiler as it is called of the usual type, equipped with the necessary connections to supply water for service purposes.

The present heater embodies a water pipe '7 which extends across the heater and is con nected at one end by a pipe 8 to the bottom of the tank 6 and at the other end by a pipe 9 to the top of said tank, whereby circulation is provided through the tank and the water heating pipe. This pipe 7 is exposed to the flame of a gas burner 10, which consists of a pipe extending across the heater under the pipe 7, and having a plurality of jet holes 11 where the gas is ignited. The gas is supplied from any suitable source through a pipe 12, with a Bunsen mixer and valve 13 to control the gas supply.

The pipes 7 and 10 are inclosed within a semi-circular drum or reflector 14 which is preferably made of polished sheet copper.

' The front of this is a perforated sheet or door 15 which is hinged at 16 so that it may be swung up to open position, when the burner is lighted.

Said drum 14 is inclosed within a larger semi-circular shell which consists of an outer sheet of metal 17, an inner sheet of metal 18 and an intermediate sheet of asbestos 19, this shell being spaced from the inner drum 14. The drum and shell extend horizontallv and are closed at the ends by end walls 20. U

The outer shell is spaced from the inner drum 14 and is associated therewith in such manner that the space increases from the bottom to the top, as clearly shown in Fig. 2, the outer shell being joined at 21 to the lower edge of the drum 14, and being spaced from the upper edge thereof by an upper front wall 22 which has a row of openings 23. The outer shell is provided near its lower edge With a row of inlet openings 24.

In operation, the inner drum 14 acts both by reflectionand conduction. That is, the heat generated at the burner 11 is reflected out through the front of the heater, and at the same time the air which flows between the drum and the shell is heated to a high degree, said air flowing in through the openings 24 and escaping at the top through the openings 23. The reflected heat from the drum, as well as the direct heat from the flame of the burner 11 is applied to the water tube 7, to heat the water in the tank 6. The asbestos lining 19 in the shell confines the heat at the back of the heater and prevents any danger of burning by contact with the shell. Therefore, the device when connected in the manner described serves as a heater for the water of a household or other system and also as an air heater using gas forfuel.

A convenient position for the location of the heater is directly under the tank 6, but it may be placed otherwise in any desired location, and it will be found to be very economical by providing a single device for both air andwater heating.

The invention is not limited to the exact form shown, but may be modified in various ways within the scope of the following claim.

I claim:

A combined water and air heater comprising an outer horizontal semicircular shell'consisting of two plates and an interposed sheet of heat-insulating materiahsaid from the upper edge, of the shell, whereby the space between the drum and shellincreases in Width toward said upper edges, 9.

gas burner pipe extending across the lower 10 part of the drum, and a water pipe extend.-

v ing-acrossuthe dnum,iabove said: burner pipe.

In testimony whereof, I affix my signature in presenee of two witnesses.

WALTER M. KEIGHLER.

Witnesses-z v 1 i l JOHN- A. SHEowIoK, WM; :1. FRANGKE. 

